Abstract
Background and Aim:Ultrasonographic fetal sexing is of utmost economic importance for horse breeders. Relatively, a few studies have been conducted to determine fetal sex in mare using transrectal Doppler ultrasound. This study aimed to compare two sexing techniques, two-dimensional (2D) mode and color Doppler ultrasonography.Materials and Methods:The study was conducted on 39 mares under field conditions. Examinations were performed using the ultrasonic model device (Medison SonoAce Pico, South Korea), equipped with real-time 3-7 MHz convex multifrequency transducer. Fetal sex diagnosis was carried out in two periods of pregnancy, early period (57-80 days of gestation) and late period (80-150 days of gestation).Results:No difference (p=0.4) was observed between the efficiency of the 2D mode and Doppler ultrasound in sex determination with the respective frequency of 74% and 85%. The best time to sex the early fetus was between 57 and 70 days of gestation and between 90 and 120 days for the older fetus.Conclusion:The accuracy of sex determination can be increased using Doppler mode compared to 2D mode, especially in the early period between 57 and 70 days, in male more than female sex.
Highlights
Ultrasound techniques are becoming increasingly important in animal reproduction, by recognizing the disease of the genital tract and monitoring of fetal growth and organ development at various stages of gestation, offering fetal sex determination technic
The accuracy of sex determination can be increased using Doppler mode compared to 2D mode, especially in the early period between 57 and 70 days, in male more than female sex
This study aimed to evaluate the accuracy of equine fetal sex determination using color Doppler ultrasonography in comparison with two-dimensional (2D) mode ultrasound
Summary
Ultrasound techniques are becoming increasingly important in animal reproduction, by recognizing the disease of the genital tract and monitoring of fetal growth and organ development at various stages of gestation, offering fetal sex determination technic. Becoming more and more interesting for breeders, fetal gender determination in the mare can provide a useful service. Sex detection allows implementation of commercial strategies, as the value of the stock at sales time is often determined by the gender of the fetus. It is certain that some horses have a higher proportion of female offspring than males, or vice versa. Ultrasonographic fetal sexing is of utmost economic importance for horse breeders. A few studies have been conducted to determine fetal sex in mare using transrectal Doppler ultrasound. This study aimed to compare two sexing techniques, two-dimensional (2D) mode and color Doppler ultrasonography
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